HOU Galaxy Crossword

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Across
  1. 2. Elliptical galaxies are red because their stars are all _____
  2. 3. The galaxy’s senior citizens live here, floating on a sphere
  3. 4. Flat, starry structure you’re living in
  4. 6. These little guys don’t fit in
  5. 7. Why the Hershels got the geometry wrong
  6. 9. Once thought to be the ancestors of galaxies like the Milky Way
  7. 10. A reason galaxies change shape.
  8. 12. Strange stellar orbits reveal its presence
  9. 13. Not the center of the galaxy, but still the center of our attention
Down
  1. 1. An ancient group, studied by Shapley
  2. 4. Strange stellar orbits reveal its presence
  3. 5. Where stars are packed tight
  4. 8. Our galaxy’s type defined by its arms.
  5. 11. The Milky Way appears milky because of them